we have FTP server using default port 21, and filezilla on clients side I want make the connection secure , I m confused about should I use SSH or SSL or both together I read about them, and didn't find anything axplaning when you should use SSH or SSL almost 2 protocols are same (for me) plz could someone point me right direction to find all answers I need ?

If you are looking for an encrypted mechanism for file transfer, then neither SSH nor SSL is the one to be used. Have you heard of SFTP (Secure FTP) ? It is exactly the same as FTP, but uses application-level encryption logic to encrypt file transfers. Instead of Port 21, it runs on port 22.

To use SFTP instead of FTP in FileZilla, go to File -> New Site -> Server Type parameter. Select "SFTP with SSH2" option and you are good to go wth encrypted file transfers.

SSH, by itself, stands for Secure Shell, wherein remote terminal connections are encrypted in the application layer on Port 22 (by default). This is a major(and much needed) improvement over standard Telnet, where the packets moved around in plaintext, and could be snooped by anyone and everyone.

SSL stands for Secure Socket Layer, which is a transport-layer protocol for ensuring information security through encryption and signatures, etc. The whole mechanism is called TLS - Transport Layer Security. Just like in TCP, TLS connections are established between 2 parties through a handshake involving exchange of public keys. In TLS, the whole transport layer payload is encrypted.